A method of reclaiming a well completion brine solution containing metal impurities by introducing to the brine solution an organic chelant of the formula: ##STR00001## and may be either a neutral compound, a corresponding salt, or a corresponding quaternary salt, wherein: D is F-A (Y.sup.3).sub.u(Y.sup.4).sub.v; R is independently selected from C.sub.p or C.sub.pC(O); C.sub.p is a C.sub.1-C.sub.36, preferably a C.sub.8-C.sub.36, hydrocarbyl group, optionally substituted with one or more substituents selected the group consisting of halogen, hydroxyl, sulfate, CH.sub.2CO.sub.2Z or --(CH.sub.2).sub.nPO(OZ).sub.2 groups; each A is independently selected from --N and --P; Y.sup.1 is independently selected from J, --[(F)-A(J)].sub.w Y.sup.6 and R; J, R.sup.1, Y.sup.2, Y.sup.3, Y.sup.4, Y.sup.5 and Y.sup.6 are independently selected from the group consisting of --H, R, --(F).sub.nCO.sub.2Z and --(CH.sub.2).sub.nPO(OZ).sub.2; each F is independently selected from a C.sub.1-C.sub.12 hydrocarbyl group, optionally substituted with one or more substituents selected from the group consisting of halogen, hydroxyl, sulfate, CH.sub.2CO.sub.2Z or --(CH.sub.2).sub.nPO(OZ).sub.2 groups; Z is --H, a balanced organic counterion or a balanced counterion of an alkali or alkaline earth metal, Zn or NH.sub.4.sup.+ or a mixture thereof; m is 0 to 7; n is 1 to 7; r+s+t is 1 or 2; u+v is 1 or 2; and w is 0 to 7 provided when m is 0, no more than one of R.sup.1, Y.sup.1, Y.sup.2 and Y.sup.5 can be --H. An organic chelant may be introduced to the brine containing the metal impurities. The brine may contain an oxidizer. Further, the pH of the brine being reclaimed or the brine reclaimed may be adjusted by the addition of a pH adjustment agent.